Beacon



FIG. 1 is a front perspective view of the beacon;

FIG. 2 is a right side view thereof, the left side view being a mirror image;

FIG. 3 is a front view thereof;

FIG. 4 is a rear view thereof;

FIG. 5 is a top view thereof; and,

FIG. 6 is a bottom view thereof.

Features shown in broken lines do not form any part of the claimed design. Any broken lines immediately adjacent the solid-line portions of the design form the boundary of the design, with the broken lines forming no part of the claimed design. 

CLAIM The ornamental design for a beacon, as shown and described. 